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Written by Tony Phelps
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Tuesday, 05 December 2006 |
In addition to the processor, a critical computer component is memory. As with humans, there is short-term memory and long-term memory. Long-term memory is represented by the hard-disk (to be covered in a future article. Computers keep short-term stuff in RAM (Random Access Memory).
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Last Updated ( Tuesday, 05 December 2006 )
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Written by Tony Phelps
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Tuesday, 21 November 2006 |
Visit a website like Dell, where you can customise a computer to your own liking and budget, and you will find that even brand new computers offer a wide variety of the most fundamental component – the processor. The “brains” that drive the computer, the processor does most of the work in getting other components to work together and producing the end results that you see and hear (and maybe feel) when using your computer. Why are there different processors, and what are the differences?
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Written by Tony Phelps
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Tuesday, 21 November 2006 |
Purchasing a new or second-hand computer is a large investment for most people. Even were cost not an issue, simply buying the most expensive system might not give you what you want. So what should you look for? It's all about knowing what you need a computer for.
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Written by Tony Phelps
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Wednesday, 15 November 2006 |
Upgrading from an old computer to a new one is a bit like moving house – lots of “stuff” has to be transferred. Alas, it is no easier to move computer than it is to move house. You need to carefully pack everything for transportation at one end, and then unpack everything into the right place at the other. At least with computers, everything gets duplicated so you always have the old one to go back to if you forgot something.
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Last Updated ( Wednesday, 15 November 2006 )
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Written by Tony Phelps
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Monday, 23 October 2006 |
With DVD players readily available and getting cheaper by the day, using a computer to watch DVD movies is not a common use for IT. Smooth viewing (no stutters in sound or breaks in the picture) and an acceptably high-quality picture need a relatively high specification and therefore expensive computer. Even so, there may be times that an alternative DVD player is useful. What is required?
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Written by Tony Phelps
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Monday, 23 October 2006 |
Anyone regularly using a computer will be familiar with the times when the computer seems to slow right down, for no apparent reason. It takes longer than usual to start up applications, and switching from one window to the next takes irritatingly long. What could be the cause?
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Last Updated ( Monday, 23 October 2006 )
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Written by Tony Phelps
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Monday, 23 October 2006 |
Cyclone Xavier made a sudden and early start to cyclone season this week, forming just above the top of Vanuatu. It is a timely reminder of the need to be prepared for cyclones, including making handy references to online sources of information on current cyclones.
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Last Updated ( Monday, 23 October 2006 )
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Written by Tony Phelps
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Monday, 16 October 2006 |
The internet not only gives a global voice to anyone with internet access, it also allows global access to knowledge. Much of human knowledge can be found online, although large proportions may be hidden in pay-for-use databases. Nonetheless, the internet can readily provide additional information or even second opinions for almost anything you can think of. One such area is health – but be sure you can trust what you find.
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Last Updated ( Monday, 16 October 2006 )
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Written by Tony Phelps
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Thursday, 05 October 2006 |
The path of an email from sender to receiver is unpredictable – delays, detours, blockages and disbelieving guards. Yet still, they make it through the numerous communications links, mail servers, routers and all the other stuff that makes up the World Wide Web. Getting email from one place to another demonstrates one of the main objectives of the founders of the internet – resilience in the face of unreliable or damaged technology.
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Last Updated ( Thursday, 05 October 2006 )
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"Computers" Column 
